The file you have requested: Tools and Utilities / Mapping / HL2: Episode One SDK Update FGD Upgrade - 239.05kb is not available. Perhaps try browsing all files for the game Half-Life 2 and upload any files you want to share or are missing. This is the only information we could locate:

This is the final modified version of the base.fgdTo use this fgd, move the 2 folders to your sourcesdk folder.Modifications done by ts2do: The upgraded FGDs make mapping in Hammer more precise by providing more entities and keyvalues, as well as fixing many datatypes.

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